Vulnerability · Published Oct 16, 2026 · Assigned by CPANSec
CVE-2026-110756Text::CSV_XS versions before 1.65 for Perl drop the end of a record and its line ending when a UTF-8 flagged field precedes invalid UTF-8 bytes in print
Critical 9.8
In plain English
A critical-severity security flaw in Text-CSV_XS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Text::CSV_XS versions before 1.65 for Perl drop the end of a record and its line ending when a UTF-8 flagged field precedes invalid UTF-8 bytes in print. When a record contains a UTF-8 flagged field, print holds back trailing bytes that are not valid UTF-8 at each buffer flush, so that a character split across two flushes can be completed. Nothing writes the held-back bytes after the record's final flush. A record whose last field ends in such a byte loses it, any closing quote and the line ending, while print still returns true. combine is not affected. The next record is written onto the same line, or, when the last field was quoted, the missing closing quote makes a reader take every following record as part of that field.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | libtext-csv-xs-perl | no fix listed | DEBIAN-CVE-2026-110756 |
| Debian:13 | libtext-csv-xs-perl | no fix listed | DEBIAN-CVE-2026-110756 |
| Debian:14 | libtext-csv-xs-perl | 1.65-1 | DEBIAN-CVE-2026-110756 |
| Ubuntu:22.04:LTS | libtext-csv-xs-perl | no fix listed | UBUNTU-CVE-2026-110756 |
| Ubuntu:24.04:LTS | libtext-csv-xs-perl | no fix listed | UBUNTU-CVE-2026-110756 |
| Ubuntu:26.04:LTS | libtext-csv-xs-perl | no fix listed | UBUNTU-CVE-2026-110756 |
| Ubuntu:26.10 | libtext-csv-xs-perl | no fix listed | UBUNTU-CVE-2026-110756 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Text-CSV_XS | 0 – before 1.65 |
Weakness: CWE-116 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H